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Growing Native Plants From Seed
Finger Lakes Native Plant Society
Cornell Plantations and the
What IS a native plant?
• A plant that grows in the same habitat in which it originated.
• Plants can be native to a continent, state, or region.
Why plant native plants?
• Well adapted to local habitats and conditions – Can be easy to maintain if planted in appropriate
setting
• Attractive – Diverse forms and colors
• Wildflowers, shrubs, vines, trees, ferns, mosses
• Manage biodiversity
Plant Habitats aka Vegetation of the Cayuga Lake Basin
( Mohler, Marks and Gardescu 2006 “Guide to Plant Communities of the Central Finger Lakes Region”)
Dry Uplands: e.g., Oak Forest
Moist Uplands: e.g., Hemlock-Beech-Birch Forest
Floodplain Forest: e.g., Sycamore-Cottonwood Forest
Swamp Forests: e.g., Red/silver Maple Swamp
Wetlands: e.g., Cattail wetlands, Rich Fens
Bogs: e.g., Leatherleaf Bog
Old Fields
Unique habitats: e.g., Lake Cliffs
Harvest seeds
Clean and store
Sow and stratify
Ensure heat and light
Pot up or transplant out
Harvest seeds when ripe • look 4-6 weeks after peak bloom
• how do I know if they are ripe?
Capture seeds
Label • name
• place
• date
Cautions and Exceptions • Harvest only with permission
• Take only 10% from a healthy population
• Some seeds are harvested slightly green
– Trillium
– small tree/shrub fruits
• Moist seeds require special treatment
– harvest in plastic bag and keep moist
Cleaning and Storage of Dry Seeds
• Dry seeds in paper bags >5 days
• Find seeds in bottom of bag or in seed head
• Separate seeds from chaff
• Use regular household items for screening
– colanders and strainers
Cleaning and Storage of Dry Seeds
• Put seeds in containers
– jars, cans, paper envelopes
• Store on shelf or in fridge
Cleaning & Storage of Moist Seeds (berries and most spring ephemerals)
• Remove fleshy covering or pods ASAP
– soak berries
• Put in plastic bags or jars with moist medium
• Keep warm or refrigerate
– spring ephemerals are kept warm for 30-90 days
Eliasomes
Sanguinaria canadensis
Bloodroot photos: Patrick Coin
Seed Stratification Stratification mimics the natural temperature cycle of warm & cold, moist conditions.
• Most native plant seeds require cold/moist followed by warming (CW)
– “Cold” = ~40º “Warm” = ~65-70º (room temp)
– Some grasses (warm season) require 75-80º
• Seeds that ripen in early summer need warm, then cold, & back to warm (WCW).
• Some native plant seeds require multiple cycles
Seed Sowing • Use trays, flats, or pots that are ~ 3-4″ deep
• Moisten mix
• Spread potting mix evenly and tamp to ½ ″ below rim
Seed Sowing, cont. • Spread seeds evenly over top of flat and cover lightly or leave open
– large seeds - press in to depth of seed size
– seeds that require light – no cover or cover with small amount of sand.
• Water in & cover with plastic bag to keep moist
• Place in fridge, cold frame or shelf (but not in sun)
Add Light and Heat • After cold/moist treatment is finished
• Put flats in direct sunlight or under lights
– 16 hours, 2-3″ from light
– Gro-lights or 1 warm & 1 cool fluorescent OK
– leave plastic bag partly open or perforate
• Keep warm and moist
– 70º is best for germination
– not too wet or too dry
• Slowly open plastic bag after germination to acclimate
• Dilute fertilizer about 4 weeks after germination
– no fertilizer for spring ephemerals
Pot Up or Transplant Out Which one depends on plant and your time frame
• Look at size of plant and root growth
– Plants need transplanting or potting up if they are too big or if roots are growing out of flat
• Wait to transplant
– if they are tiny
– if they are slow to germinate
– if they are developing roots and not shoots
• Examples: Smilacina, Actaea, Arisaema, Trillium, Lilium
• Sun, Shade
• Wet, Dry
• Soil Type
– Acid, Basic (limey)
– Drainage
Cultural Conditions
Mundy Wildflower Garden Cornell Plantations
Natives to Propagate from Seeds
Photo Paul Schmitt
Sanguinaria canadensis, Bloodroot
Grows in shade or part sun, in moist to dry soil. Prefers alkaline soils. Height 6”.
Early April
Early April Trillium erectum Wet Dog Trillium Moist soil, shade. Ht. 8-24”
Asarum canadensis, Wild Ginger Grow in shade. Ht. 3- 5”.
Mid-April
Jeffersonia diphylla
Twin Leaf
Grow it in part sun or full shade in moist to dry soil. Height ~ 2’.
Mid-April
Caltha palustris, Marsh Marigold grows in moist to wet soil. It likes wet feet; do not allow it to dry out. Ht. 2’.
Late April
Late April
Trillium grandiflorum, Large Flowered Trillium grows best in part to full shade in a moist woodland setting.
Mertensia virginica, Virginia Blue Bells naturally grow on shady stream banks. They grow well in shade or part sun. Height ~ 18”.
Late April
Late April to May
Geranium maculatum, Wild Geranium Grow in part sun or full shade. Height 2’.
Aquilegia canadensis, Wild Columbine is easy to grow in full sun or shade and moist or dry soil. The height (18-36”) depends on the amount of light and moisture.
Early May
Arisaema triphyllum, Jack in the Pulpit grows in part to full shade in moist soil. Ht. 2’.
May
Actaea rubra, Red Baneberry grows in full shade in well drained soil. Height ~ 2’.
Late May
Actaea pachypoda, Doll’s Eyes grow in full shade and well-drained soil. Height ~ 2’.
Late May
Iris versicolor Blue Flag Iris grows in full sun to part shade in moist to medium soil. It flowers best in part to full sun. Height 2½’.
Late May
Polygonatum biflorum var. commutatum, Great Solomon’s Seal A Non-native that grows well in the garden with protection from deer. Height 2-3’. This is a large variety of P. biflorum that is sold in nurseries and planted in the WFG. Our locally native Polygonatum species are shorter in stature. Polygonatum pubescens has downy hairs covering the underside of the leaf. It occurs naturally in the WFG on the steep woodland slopes. Polygonatum biflorum var. biflorum Leaves have smooth or glabrous undersides. It does not occur in the WFG, but is found locally in nearby natural areas.
Polygonatum pubescens in the WFG
Non-native
Figuring out the Solomon’s Seal
Late May
Penstemon hirsutus, Hairy Beardtongue grows in full sun or part shade in well-drained soil or gravel. Naturally a west facing cliff dweller, but it adapts well to the garden if given a sunny spot and space. Ht. 1-3 ft.
June
Sambucus canadensis, American Elderberry This fast growing large multi-stemmed, shrub is an excellent wildlife habitat plant. Height 7-15’.
Mid-June
Asclepias tuberosa, Butterfly Weed is easy to grow in full sun and well-drained sand, gravel, or good garden soil. Height: ~1-2.5 ‘.
June
Anemone virginiana Thimbleweed Easy to grow in dry shade. Height 1-2.5’.
July
Mid-July
Monarda fistulosa, Wild Bergamot or Lavender Bee Balm grows best in dry, well-drained sites in full sun to part shade. Ht. 1-4 ft.
Lobelia siphilitica, Great Blue Lobelia Is a biennial that grows in sun or shade and moist to dry soil, but is best in moist soils. Height 18-36”.
Late July
Lobelia cardinalis, Cardinal Flower grows in sun or shade and moist to dry soil, but is best in evenly moist soils and full sun. Height 2-4’.
Mid-July
Mid-June
Rubus odoratus, Purple Flowering Raspberry is a small shrub with edible fruits and beautiful flowers that makes excellent ‘wildlife habitat’. It prefers a rocky, well drained, partly sunny site. Mature height 6’ x 6’.
Late June
Asclepias incarnata, Swamp Milkweed grows well in the garden. It prefers moist to wet soil in sun, but tolerates part shade. Height 2 - 5’, depending on light and moisture. Host plant for the Monarch butterfly caterpillar. Nectar plant for other butterflies.
Monarda didyma, Bee Balm is a good tea plant due to its fragrant oils of bergamot. Grow in moist soils, in sun or shade. Height 3-4’.
Mid-July
Chelone glabra, White Turtle Head Grow in full sun or part shade in moist to wet soil. Height 2-3’.
Chelone lyonii, Pink Turtle Head
is native father south, but grows in gardens in
the Finger Lakes
Late- August
Clematis virginiana
Virgin’s bower
Sun to part shade, moist
Vining-- use as screen or ground cover
Late- August
Fall Asters & Grasses and Goldenrods
Aster novae-angliae, New England Aster An easy to grow violet-blue, purple, or pink aster with a large inflorescence. Grows best in moist soil in full sun, but will tolerate part shade and drier sites. A tall plant; to keep short cut back by half mid-season. Height 3-5’.
September
Baird Meadow, Cornell Plantations
Elymus hystrix, Bottlebrush grass grows in part shade to sun and dry to moist soil. Height 18-30”.
Elymus canadensis, Canadian Wildrye has bluish foliage & fruit. Grow in sun and dry soil. Height 2 to 4’.
Fall Cool Season Grasses
FALL Solidago species
Solidago juncea Early Goldenrod
Solidago bicolor Silver rod
Solidago nemoralis Gray Goldenrod
Solidago flexicaulis Zig-zag Goldenrod
Solidago caesia Wreath Goldenrod
Solidago sempervirens Seaside Goldenrod
Shrubs
Think about using native shrubs in a mixed border or thicket.
Cornus sericea
Cornus racemosa
Cornus alternafolia
Cornus amomum
have nice fall color & provide wildlife food.
Shrubs/small trees 5-20 ft.
Viburnunm lentago and Lindera benzoin
Lindera benzoin, Spice bush is a slow growing, medium sized shrub. It grows best in alkaline soil in a moist to dry site. Mature height 8-10’.
2006 Lawrence Kelly
Learn Native Plants and Habitats
• FLNPS : Walks, Talks and People
• Petersons: A Field Guide to Wildflowers of the Northeast and North Central North America
• Cornell Plantations Mundy Wildflower Garden
• Finger Lakes Land Trust walks
• Lime Hollow Nature Center
Sources • Plant Sale in May
• October: FLNPS seed collecting • December: FLNPS Seed Exchange • Local nurseries:
– Plantsmen www.plantsmen.com – White Oak Nursery www.whiteoaknursery.biz
• Remember: Choose native species that have been propagated from seed. Do not dig plants from the wild!
Acknowledgements Many thanks to those who have contributed their
photographs and their time. Drew Noden Susanne Lorbeer Irene Lekstutis Jesse Hoffman Paul Schmitt Ann Kelly Robert Wesley Rosemarie Parker Melanie Uhler Krissy Faust Kevin Nixon Meredith Cosgrove Anna Stalter Bill Hecht